Question

for b in the proportion.
\frac{3}{19} = \frac{9}{b}

b = \square

Explanation:

Step1: Cross-multiply the proportion

$3 \times b = 19 \times 9$

Step2: Calculate right-hand side product

$3b = 171$

Step3: Solve for b by dividing by 3

$b = \frac{171}{3} = 57$

Answer:

57